Hi all!
I would like to make our docking more sensitive, so that we get docking hint only when the user is very close to the border of the app or other panes.

I decreased the values of auiInsertRowPixels , auiNewRowPixels , auiLayerInsertPixels and auiLayerInsertOffset. It helped, however I still have the following problem.
There are 2 panes on the bottom of the app (layer is 0). I undock one of them and drag it over the other. Instead of getting the hint when I'm close to the edge of the pane I get it once the floating pane has passed the middle of the dockingo one.

Is there a way to force the hint to appear only when we are close to window edge in this case?

Yes, but you're going to have to modify the DoDrop function. Sadly, I forgot to make it virtual, so you can't really override it by deriving. A lot of the behavior can be modified by changing those numbers, but some of the behavior is codified in the DoDrop algorithm.